一种基于光学隧穿效应的新型拾音器方案探索

发布时间：2018-06-03 10:16

  本文选题：激光技术 + 光学拾音器　； 参考：《激光技术》2017年06期

【摘要】：为了探索新型高灵敏度光电拾音器技术方案,基于光学隧穿效应研究,将声压变化转换为全反射棱镜中全反射面与摆片光学面之间的光学隧穿距离变化,从而改变光束在棱镜全反面处的反射(透射)损耗,通过直接测量反射(透射)光的功率变化,实现拾音器基本功能。利用半导体激光器和直角全反射棱镜搭建了一套简易的原理验证实验系统,并利用该系统对三角波信号驱动进行了实验。结果表明,反射光功率会随着三角波信号的改变而改变,光功率改变达到5.6%;由声音引起的玻璃振膜距离变化也可改变输出光功率,并被检测出来。初步验证了该方案的可行性。
[Abstract]:In order to explore a new type of high-sensitivity photoelectric pickup, based on the study of optical tunneling effect, the change of sound pressure is converted into the change of optical tunneling distance between the total reflector and the optical surface of the pendulum in the total reflection prism. In order to change the reflection (transmission) loss of the beam at the whole opposite side of the prism, the basic function of the pickup can be realized by directly measuring the power change of the reflected (transmitted) light. A simple experimental system is built by using semiconductor laser and right angle total reflection prism. The system is used to test the driving of triangular wave signal. The results show that the reflected optical power will change with the change of the triangular wave signal, and the optical power will change to 5.6, and the change of the distance of the glass film caused by sound can also change the output optical power and be detected. The feasibility of the scheme is preliminarily verified.
【作者单位】： 国防科技大学光电科学与工程学院;
【基金】：2016年国家级大学生创新训练资助项目(20169002051) 国防科技大学光电科学与工程学院2015年教育教学改革研究课题资助项目(2015XY05)
【分类号】：TN64
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本文编号：1972422